215022252321 has 16 divisors (see below), whose sum is σ = 319046925120. Its totient is φ = 143125220160.

The previous prime is 215022252283. The next prime is 215022252323. The reversal of 215022252321 is 123252220512.

215022252321 is a `hidden beast` number, since 21 + 50 + 22 + 252 + 321 = 666.

It is not a de Polignac number, because 215022252321 - 2¹¹ = 215022250273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (215022252323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6175320 + ... + 6210041.

It is an arithmetic number, because the mean of its divisors is an integer number (19940432820).

Almost surely, 2^215022252321 is an apocalyptic number.

It is an amenable number.

215022252321 is a deficient number, since it is larger than the sum of its proper divisors (104024672799).

215022252321 is a wasteful number, since it uses less digits than its factorization.

215022252321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12386013 (or 12386007 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 215022252321 its reverse (123252220512), we get a palindrome (338274472833).

The spelling of 215022252321 in words is "two hundred fifteen billion, twenty-two million, two hundred fifty-two thousand, three hundred twenty-one".